Coxswain
The coxswain is in charge of all personnel and equipment in the boat. Subject to the orders of the Officer of the Deck (OOD) and the senior line officer embarked, a coxswain otherwise has full authority and is responsible for the boat's appearance, safety, and efficient operation. The crew and passengers (including embarked troops) are required to cooperate fully with the coxswain. In fulfilling his or her responsibilities, the coxswain must be familiar with all details relating to the boat's care and handling. Equally important, the coxswain must be able to instruct the crew in all aspect of the general service and drills. The coxswain is also responsible for the appearance and behavior of the crew.
Read more about this topic: Navy Boat Crew